The crape myrtle is also a kind of landscaping tree that is vulnerable to pests and diseases. The following describes the occurrence rule and control method of the main pests and diseases of crape myrtle as follows. powdery mildew Powdery mildew is a worldwide disease, and the host is very extensive. It is one of the major violations of it. Lagerstroemia powdery mildew is widespread in China's provinces and cities where Lagerstroemia is planted. After the onset of disease, the leaves of Lagerstroemia crinocarpus are often yellowed and shed, which directly affects the tree vigor and ornamental effect. Prevention The horticultural control of Lagerstroemia crassipes has strong sprouting ability. Therefore, for plants with severe disease, all branches of the year can be cut off in the winter and burned in a concentrated manner, thus completely eliminating the source of the disease. If the house-planted crape myrtle is found to be infected with powdery mildew, remove the diseased leaf in time and place the potted flower in an airy and light-transmitting place. In field cultivation, the planting density should be controlled, and daily management should be strengthened. Phosphorus and potassium fertilizers should be added, and the application amount of nitrogen fertilizer should be controlled so as to increase the disease resistance of the plants. At the same time, attention should be paid to the selection of disease-resistant varieties. When the agent is used to prevent severe disease, it can be sprayed with Baume 3-4 Lithosulfide prior to sprouting in the spring; in the growing season, it can be sprayed with 80% dexamethasone WP 500 times, or 70% thiophanate-methyl 1000 times. Liquid, or 20% Tricine cream 1500 times, or 50% carbendazim WP 800 times. Brown spot Brown spot disease is also a widespread disease on garden plants that occurs frequently in the crape myrtle growing season. Severe occurrence of brown spots often leads to a large number of yellow leaves and shedding of plant leaves. Affects the viewing and flowering. Prevention Early detection and prevention of horticulture, timely removal of diseased branches, diseased leaves, and concentrated burned or buried in order to reduce the source of bacteria. Strengthen cultivation management, pruning, and make plants airy and transparent. It is best to replace the new soil every year in the family potted plants. In the early stage of the disease prevention and treatment, 50% carbendazim WP can be sprayed 500 times, or 65% zeocin WP can be used 1000 times, or 75% chlorothalonil WP can be controlled 800 times. Coal pollution Coal pollution, also known as coal smoke disease, commonly occurs in garden plants throughout China. The damage to crape myrtle is mainly caused by the damage of Lagerstroemia Chinensis and Lagerstroemia speciosa, that is, the mucilage excreted by them is a nutrient, which induces a large number of breeding of coal-borne pathogens. After the onset of disease, the diseased plant leaves covered with black mold layer, not only affect the ornamental value of crape myrtle, but also affect the photosynthesis of leaves, leading to plant growth and weakness, early defoliation. Prevention Horticultural control 1 through the seedlings, pruning and other measures to make trees ventilated, light; 2 timely control of locusts, scale insects, whiteflies and other because the secretions of these insects is the basis for the existence of coal pollution pathogens. The commonly used pharmaceutical agents for prevention and treatment of lime sulfur, the use of Baume in the winter 3 lime sulfur, summer and autumn with 0.3 lime sulfur. It can also be used for the prevention and treatment of trisphorus and green cubeba leaf juice. Scarab The yellow-spotted moth, medium in size, and the larvae of the caterpillar, commonly known as the Pacific pepper, are one of the main omnivorous leaf-feeding pests of garden flowers. Prevention The horticultural control combines pruning in the winter and removes overwintering mites on the branches to eliminate or reduce the source of insects. Physical control of family potted crape myrtle can be removed manually after defoliation to eliminate overwintering insects, which can completely eliminate the source of insects. When producing in Daejeon, black light traps can be set in adult eclosion stages. Chemical control of pesticides is best used before the larvae spread, and can be sprayed with 80% dichlorvos EC 1000 times, or 50% phoxim EC 1000 times, or 2.5% deltamethrin EC 4000 times. The crape myrtle will also have some harms such as the green thorn moth or brown thorn moth, but they all belong to moths. Apart from slight differences in morphology, they have a lot of similarities in living habits and laws of occurrence, and can be used in the control of yellow thorn moths. Time and governance.
Lewin Medical standing flexible arm led Examination Lamp. mainly used in a variety of clinic, it`s move portable, flexible and unlimited space, especially to meet the hospital emergency, obstetrics, pediatrics and other departments to use, the lamp is equipped with flexible rotation medical casters and brake device configuration, can be conveniently placed at any position. Examination Lamp constant power control,:security, accuracy and maintain accurate color temperature. Continuously adjusting brightness wihile the color temp remains same.
Examination Lamp Examination Light,Mobile Examination Lamp,Examination Lamp,Floor Type Examination Lamp Shandong Lewin Medical Equipment Co., Ltd. , https://www.lewinmed.com
